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Unformatted text preview: NAME(S): BIOL120 Activity#8: Plant Structure & Growth Winter 2008 1. Microbiologist Kwang Jeon was studying single-celled amoebae in 1966 when his amoeba communities became infected with bacteria that he named “x-bacteria”. These bacteria entered the ameba cells and killed the majority of the individuals in the colony. After a period of a few years, however, the few surviving amoebae and their descendents were unexpectedly vigorous. Dr. Jeon and his colleagues checked to see if the ameba cells had managed to rid themselves of the x-bacterial infection and were surprised to find that the answer was no. The x-bacteria were still inside their hosts but they no longer made the amoebae sick. The scientists were even more surprised when they used antibiotics to kill the x-bacteria and the host amoebae also died. The amoebae could no longer live without the x-bacteria. This scenario is not made up but actually occurred. It was published in amoebae could no longer live without the x-bacteria....
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